#include <REGX52.H>

void Delay(unsigned int xms)	//@12.000MHz
{
	unsigned char data i, j;
    while(xms--)
	{
		i = 2;
	j = 239;
	do
	{
		while (--j);
	} while (--i);
	}
}



unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};

void  Nixie(unsigned char Location,Number)
{
	switch(Location)
	{
		case 1: P2_4=0; P2_3=0; P2_2=0; break;
		case 2: P2_4=0; P2_3=0; P2_2=1; break;
		case 3: P2_4=0; P2_3=1; P2_2=0; break;
		case 4: P2_4=0; P2_3=1; P2_2=1; break;
		case 5: P2_4=1; P2_3=0; P2_2=0; break;
		case 6: P2_4=1; P2_3=0; P2_2=1; break;
		case 7: P2_4=1; P2_3=1; P2_2=0; break;
		case 8: P2_4=1; P2_3=1; P2_2=1; break;

	}
	P0=NixieTable[Number];
	Delay(1);
	P0=0x00;
}





void main()
{
	
	while(1)
	{
		Nixie(1,1);
		Nixie(2,2);
		Nixie(3,3);
	}
}